The radical centre of the circles
`x^(2) + y^(2) + x + 2y + 3 = 0," "x^(2) + y^(2) + 2x + 4y + 5=0 and x^(2) + y^(2) - 7x - 8y -9=0`
is

The radical centre of three circles : x^2 + y^2 + x + 2y + 3 = 0, x^2 + y^2 + 2x + 4y + 5 = 0 and x^2 + y^2 - 7x - 8y - 9 = 0 is : (A) (- 2/3, - 2/3) (B) (1/3, 1/3) (C) (1/4, 1/4) (D) (0, 0)

Two circles x^(2) + y^(2) - 2x - 4y = 0 and x^(2) + y^(2) - 8y - 4 = 0

Let circle cuts ortholognally each of the three circles x^(2) + y^(2) + 3x + 4y + 11 = 0, x^(2) + y^(2) - 3x + 7y - 1 = 0 and x^(2) + y^(2) + 2x = 0

The radius of the circle 3x^(2)+3y^(2)+9x+8y-4=0 is

The radical center of the circles x^(2)+y^(2)-4x-6y+5=0 , x^(2)+y^(2)-2x-4y-1=0 , x^(2)+y^(2)-6x-2y=0 .

" The radical centre of the circles "x^(2)+y^(2)-x+3y-3=0,x^(2)+y^(2)-2x+2y-2=0,x^(2)+y^(2)+2x+3y-

Find the radical center of the circles x^(2)+y^(2)+4x+6y=19,x^(2)+y^(2)=9,x^(2)+y^(2)-2x-4y=5

Centre and radius of circle 2x^(2) + 2y^(2) - 6x + 4y - 3 = 0 are

Find the equation of the circle which intersects thecircles x^(2)+y^(2)+x+2y+3=0,x^(2)+y^(2)+2x+4y+5=0, and x^(2)+y^(2)-7y-8y-9 at right angle.